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-% pgf/tikz library
-% for signal flow diagrams
-%
-% Author: Dr. Karlheinz Ochs, Ruhr-University of Bochum, Germany
-% Version: 0.1
-% Date: 2007/01/05
-
-
-%
-% Styles for nodes, terminals, and operators.
-%
-% - nodes and terminals
-\tikzstyle{node style}%
- = [draw=\pathdrawcolor,
- fill=\pathdrawcolor,
- minimum size=\nodesize]
-\tikzstyle{terminal style}%
- = [draw=\pathdrawcolor,
- fill=\pathfillcolor,
- line width=\pathlinewidth,
- minimum size=\terminalsize]
-\tikzstyle{node}%
- = [node shape,
- node style]
-\tikzstyle{input}%
- = [input terminal shape,
- terminal style]
-\tikzstyle{output}%
- = [output terminal shape,
- terminal style]
-% - operators
-\tikzstyle{operator color}%
- = [draw=\operatordrawcolor,
- fill=\operatorfillcolor]
-\tikzstyle{operator style}%
- = [operator color,
- line width=\operatorlinewidth,
- minimum size=\operatorsize]
-\tikzstyle{multiplier}%
- = [multiplier shape,
- operator style]
-\tikzstyle{modulator}%
- = [modulator shape,
- operator style]
-\tikzstyle{adder}%
- = [adder shape,
- operator style]
-\tikzstyle{delay}%
- = [rectangle,
- operator style,
- minimum size=\delaysize]
-
-
-%
-% Circular shapes of operator symbols.
-%
-% #1 = additional inner symbol
-\newcommand{\circularshape}[1]{%
- \savedanchor\centerpoint{\pgfpointorigin}
- % radius is half of maximum of \pgfshapeminwidth and \pgfshapeminheight
- \saveddimen\radius{%
- \setlength{\pgf@xa}{\pgfshapeminwidth}
- \setlength{\pgf@ya}{\pgfshapeminheight}
- \ifdim\pgf@xa>\pgf@ya
- \pgf@x=.5\pgf@xa
- \else
- \pgf@x=.5\pgf@ya
- \fi
- }
- \inheritanchor[from=circle]{center}
- \inheritanchorborder[from=circle]
- \inheritanchor[from=circle]{north}
- \inheritanchor[from=circle]{north east}
- \inheritanchor[from=circle]{east}
- \inheritanchor[from=circle]{south east}
- \inheritanchor[from=circle]{south}
- \inheritanchor[from=circle]{south west}
- \inheritanchor[from=circle]{west}
- \inheritanchor[from=circle]{north west}
- \inheritanchor[from=circle]{mid}
- \inheritanchor[from=circle]{mid west}
- \inheritanchor[from=circle]{mid east}
- \inheritanchor[from=circle]{base}
- \inheritanchor[from=circle]{base west}
- \inheritanchor[from=circle]{base east}
- % circular shaped frame
- \inheritbackgroundpath[from=circle]
- % additional inner symbol
- \foregroundpath{
- \centerpoint%
- \pgf@xc=\pgf@x%
- \pgf@yc=\pgf@y%
- \@tempdima=\radius%
- #1
- }
- % no text
- \nodeparts{}
-}
-
-
-%
-% Anchors for default text box, see below.
-%
-\newcommand{\stdaboveanchor}{%
- \anchor{text}{%
- \centerpoint
- \advance\pgf@x by-0.5\wd\pgfnodeparttextbox%
- \advance\pgf@y by\radius
- \advance\pgf@y by+0.5mm
- }
-}
-\newcommand{\stdrightanchor}{%
- \anchor{text}{%
- \centerpoint
- \advance\pgf@x by\radius
- \advance\pgf@x by+0.5mm
- \advance\pgf@y by-0.5\ht\pgfnodeparttextbox%
- \advance\pgf@y by+0.5\dp\pgfnodeparttextbox%
- }
-}
-\newcommand{\stdbelowanchor}{%
- \anchor{text}{%
- \centerpoint
- \advance\pgf@x by-0.5\wd\pgfnodeparttextbox%
- \advance\pgf@y by-\ht\pgfnodeparttextbox%
- \advance\pgf@y by-\radius
- \advance\pgf@y by-0.5mm
- }
-}
-\newcommand{\stdleftanchor}{%
- \anchor{text}{%
- \centerpoint
- \advance\pgf@x by-\radius
- \advance\pgf@x by-\wd\pgfnodeparttextbox%
- \advance\pgf@x by-0.5mm
- \advance\pgf@y by-0.5\ht\pgfnodeparttextbox%
- \advance\pgf@y by+0.5\dp\pgfnodeparttextbox%
- }
-}
-
-
-%
-% Circular shapes of operator symbols with default text box.
-%
-% #1 = place of the default text box
-\newbox\pgfnodepartabovebox
-\newbox\pgfnodepartrightbox
-\newbox\pgfnodepartbelowbox
-\newbox\pgfnodepartleftbox
-\newcommand{\labelledcircularshape}[1]{%
- % node parts
- \nodeparts{text,above,right,below,left}
- % anchors
- \savedanchor\centerpoint{\pgfpointorigin}
- % radius is half of maximum of \pgfshapeminwidth and \pgfshapeminheight
- \saveddimen\radius{%
- \setlength{\pgf@xa}{\pgfshapeminwidth}
- \setlength{\pgf@ya}{\pgfshapeminheight}
- \ifdim\pgf@xa>\pgf@ya
- \pgf@x=.5\pgf@xa
- \else
- \pgf@x=.5\pgf@ya
- \fi
- }
- \inheritanchor[from=circle]{center}
- \inheritanchorborder[from=circle]
- \inheritanchor[from=circle]{north}
- \inheritanchor[from=circle]{north east}
- \inheritanchor[from=circle]{east}
- \inheritanchor[from=circle]{south east}
- \inheritanchor[from=circle]{south}
- \inheritanchor[from=circle]{south west}
- \inheritanchor[from=circle]{west}
- \inheritanchor[from=circle]{north west}
- \inheritanchor[from=circle]{mid}
- \inheritanchor[from=circle]{mid west}
- \inheritanchor[from=circle]{mid east}
- \inheritanchor[from=circle]{base}
- \inheritanchor[from=circle]{base west}
- \inheritanchor[from=circle]{base east}
- #1
- \anchor{above}{%
- \centerpoint
- \advance\pgf@x by-0.5\wd\pgfnodepartabovebox%
- \advance\pgf@y by\radius
- \advance\pgf@y by+0.5mm
- }
- \anchor{right}{%
- \centerpoint
- \advance\pgf@x by\radius
- \advance\pgf@x by+0.5mm
- \advance\pgf@y by-0.5\ht\pgfnodepartrightbox%
- \advance\pgf@y by+0.5\dp\pgfnodeparttextbox%
- }
- \anchor{below}{%
- \centerpoint
- \advance\pgf@x by-0.5\wd\pgfnodepartbelowbox%
- \advance\pgf@y by-\ht\pgfnodepartbelowbox%
- \advance\pgf@y by-\radius
- \advance\pgf@y by-0.5mm
- }
- \anchor{left}{%
- \centerpoint
- \advance\pgf@x by-\radius
- \advance\pgf@x by-\wd\pgfnodepartleftbox%
- \advance\pgf@x by-0.5mm
- \advance\pgf@y by-0.5\ht\pgfnodepartleftbox%
- \advance\pgf@y by+0.5\dp\pgfnodeparttextbox%
- }
- % circular shaped frame
- \inheritbackgroundpath[from=circle]
-}
-
-
-%
-% Shape of a node.
-%
-\pgfdeclareshape{node shape}{\labelledcircularshape{\stdaboveanchor}}%
-
-%
-% Shape of an input terminal.
-%
-\pgfdeclareshape{input terminal shape}{\labelledcircularshape{\stdleftanchor}}%
-%
-% Shape of an output terminal.
-%
-\pgfdeclareshape{output terminal shape}{\labelledcircularshape{\stdrightanchor}}%
-%
-% Shape of a multiplier.
-%
-\pgfdeclareshape{multiplier shape}{\labelledcircularshape{\stdleftanchor}}%
-%
-% Shape of a modulator.
-%
-\pgfdeclareshape{modulator shape}{\circularshape{%
- \pgfpathmoveto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{-0.707107\@tempdima}{-0.707107\@tempdima}}}
- \pgfpathlineto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{0.707107\@tempdima}{0.707107\@tempdima}}}
- \pgfpathmoveto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{0.707107\@tempdima}{-0.707107\@tempdima}}}
- \pgfpathlineto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{-0.707107\@tempdima}{0.707107\@tempdima}}}
-}}%
-%
-% Shape of an adder.
-%
-\pgfdeclareshape{adder shape}{\circularshape{%
- \pgfpathmoveto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{-0.5\@tempdima}{0\@tempdima}}}
- \pgfpathlineto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{0.5\@tempdima}{0\@tempdima}}}
- \pgfpathmoveto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{0\@tempdima}{-0.5\@tempdima}}}
- \pgfpathlineto{\pgfpointadd{\pgfpoint{\pgf@xc}{\pgf@yc}}
- {\pgfpoint{0\@tempdima}{0.5\@tempdima}}}
-}}%
-
-\endinput